30.94% is the change from 307 to 402
Calculation steps:
[( 402 - 307 ) ÷ 307] x 100 = 30.94%
Formula
Percentage change = [(402 - 307) / 307] x 100
Subtract the new number by the original number
402 - 307 = 95
95 ÷ 307 = 0.30944625407166126
0.30944625407166126 x 100 = 30.94%